Rotary pump



G. HANDLEY.

ROTARY PUMP.

APPLICATION FILED ocT.24, 1919.

Patented Mar. 1920.

G. HANDLEY.

ROTARY PUMP.

APPLICATION FILED ocT.24, I9I9.

`PateInvaed Mar. 30, 192th 2 SHEETS-SHEET 2.

VVE/v10@ awr? UNITE encuen HANDLEY, or returns GREEN, ENeLANn'AssreNon or ONE-HALF To rEacY Berneck, or LONDON, ENGLAND.

BOTRY PUMP.

Application medoetober 24, 1919. Serialy No. 333,023.

To all whom t may concern: l

Be it known that I, GEORGE HANDLEY, a

subject of the'King of Greatf Britain, resid? ing at-Palmers Green,

larger diameter, and is operated by an eccentric ixed upon a shaft passing through the cylindrical chamber the rotor Ahaving formed u on it or xed thereto a radial blade, divlsion plate, or stem moving -1n a slot provided in an oscillatory member. The

. said oscillatory member isprovided with ports adapted to register with other ports in the pump casing or in a'llixed bushing' partially 'surrounding the oscillatory member, the registration being arranged to take place when the lair or gaseous fluid in 'the` pump chamber has attained a certain desired pressure, or when the rotor has completed a pre-determined portion of its cycle.

It is obvious that in any contrivance of this class in which only two elements wit-h ports therein are employed to provide registration, namely' the oscillatory member and the ixedxbushing, the width of the portsjis strictly limited by the circumferential movement of the oscillatory member. This is the maximum possiblel width, since if made wider than this. the ports would overlap and be useless. Also in actual practice the ports must be made very much narrower than this maximum width, since the pressure attained at one half stroke .is little more than one atmosphere-t.

p Nowthe angularmovementof the oseillatory'\member is necessarily small and a port having va width which is much narrower than `the arc traced by the radius of this member would inpractice befinad'equate to -pass any considerable quantity of air, and

the eiect of tryin'g'tov i'rorce the contents of the pump chamber. through such a small opening-would be to greatly increase the power required to drive the pump and to unduly heat the air or gaseous duid andthe pump itself.

By the prt invention the above mentioned diiiculty is overcome by providing a third element with a port therein, so that all three ports must register before the airy or gaseous iuid can escape. Such third element may be constituted by the stem of the rotor or by the bushing or sleeve surround= ling the oscillatory member; in the latter case the said' bushing or sleeve instead of being ixed is made to oscillate through an angle greater than the angular movement of the oscillatory member in which the `stem of the rotor slides.

Since in this arrangement the contents of the pump chamber are cut oil for preliminary compression before reaching the opening in the stem, the compressed contents of the latter cannot expand back into the pump chamber and the amount of clearance space is reduced to a minimum.

Moreover according to the present inven tion, in order to dispense with the usual type of outlet valve to relieve pressure upon the pendulum stem, l provide one or other of rv the following contrivances, viz z--A plate or disk or segment of a plate or disk at one or both ends'of the oscillatory member. Such plate or disk, or portion or segment thereof,

y'providedwith the necessary ports or open- -the Ymouth of this channel being near the bob of the rotor, and the exit some distance up the stem in Athe face thereof, a port in the oscillatory member being provided to communicate with the channel in the stem at certain times and with an outlet in the body of the compressor. In this case the sleeve surrounding the oscillatory member Specification of Letters Patent. Patented Mar, 30, 1920.

is ixed. n these arrangements the passage l in the rotor stem is not necessarily cut of from the pump chamber until the cycle of the rotor is completed. a AIn the accom anyin rawin Figure l 'is aphalf eid elevatlgosn with the endvcover plate removed, and half transverse section of a pump or compressor coni struct/ed according te my 'invtiom Fig. 2 is an end view of a portion of a compressor with cover plate and gland removed, illustrating a modification.

Fig. 3 is a section taken on the line 3--3 A oscillatory member.

Figs. 8 and 9 are partial transverse sections and partial end elevations with the cover plate removed of a further modification, showing the moving parts of the pump in two different positions.

Fig. 10 is an end elevation with the end plate removed illustrating a further modification.

Fig. 11 is an end view of the rotor and stem.

Fig. 12 is a section on the line 12-12 of Fig. 11, and

Fig. 13 is a side view of a cylinder or plunger type of rotary valve which is mounted in the stem of the rotor.

Fig. 14 illustrates partly in section .a

further modification in which the outlet is at the side, and the stem of the rotorhas a D-shaped channel, the sleeve being statlonary.

Like letters represent corresponding parts 1 in the several figures.

Referring` to Fig. 1, A is the compressor body; B the rotor mounted on an eccentric C carried by the shaft D; E the stem of the rotor; F an oscillatory member slotted at F to receive the stem E, and perforated at F2 to form the outlet for the compressed Huid. G is a fixed sleeve in which the member F oscillates; H is the inlet in' the pump body, and J the outlet. The sleeve G is slotted at G opposite the inlet H, also at G opposite the outlet J, and is further formed With a channel at Gr3 leading to a port G.

Thestem Eef the rotor is furnished with an outlet channel or port E the entrance to which does not at any time open directly into the pump chamber but always remains within the oscillatory member F. Said oscillatory member is furnished with a' port vor channel F3 adapted to register at certain times with the port G* in the sleeve G, and

Withthe port E in the stem E. The, construction of these ports is such that the.pas.- .sage in the oscillatory member discharges into the passage in the stem and from thence through the opening in the upper part of the oscillatory member to the pump outlet. But the port in the stemk does not register with the inner end yof the passage in the oscillatory member until the` required'por-- tion of the cycle of the rotor has been completed.

It will beseenthat before there is an outlet for the compressed fluid it is necessary for there to be registration V between the ports Gr4 and F8., and also between the ports F8 and E. This feature constitutes the novelty of the arrangements so far described, and secures the advantages above specified.

Referring to Figs. 2 to 7, K is a disk mounted eccentrically in an adjusting ring L and provided with a port M whichregisters with an outlet `N in the cover plate '0,

the Whole constituting a mechanically op erated disk valve. The disk K is oscillated by a pin P working in the slot K in the disk K, said pin P being fixed in the end of the oscillatory member F and carrying an antifriction roller P. The member F and disk K turn about diilerent axes, andv cycle of the rotor B. The outlet from the oscillatory member VF is shown at F.

This arrangement is suitable for side out- 'let c. g. when using pumps arranged in series.

Referring now to Figs. 8 and 9, in this be made to register at different points in the case the moving disk K indicated by broken lines is mounted and actuated as in Figs. 2'

and 3 but it is not furnished with a port, and is used as a means of'transmitting motion to a sleeve S which surrounds the oscillatory member F. For this purpose' the sleeve S is furnished with a pin' S- and' roller S2 working in the slot K ofthe disk K.

- The moving sleeve S works in a fixed sleeve G and is provided with inlet and outlet ports S3, S respectively adapted to register with the .corresponding ports Gr, G3 ofv the fixed sleeve G. Said ports Ss, S* also register at a predetermined time with the inlet. and outlet passages F. F2 respectively of the oscillatory member F. 4 It will be seen that in this arrangement thestem of the pendulum is relieved fromall pressure, both from the pump chamber and the receiver, during` the greater 'pon tion of thestroke. 1

Refcrringto 10 to in this modi-f @cation the stem ofthe rotor is bored atT to.

receive a cylindrical 'valve -W the body of which is cut away 'to 'form a gap at W so that in one position of the valve a communication is provided through the stern of `the rotor, which communication can, be closed by turning the valve about its" axis. The valve is furnished at one end with a crank pin W carrying an antifriction roller W and engaging with aradial slot reame?? Y in a disk Y mounted in the end plate of the pump. Said disk Y can be turned by means of a screw Y2 in the same manner as the disk K in Fig. 2 is rotated. In this way the position of the slot Y can be adjusted y as required.

Jfrom that shown in Fig. 1 in that the outlet f by the movement of the channel E in the stem of the rotor is D- shaped and both ends of the channel are in the face of the stem, the lower opening being near the bob of the rotor. The inner end.

of the outlet channel or port F2 in the oscillatory member in this case is so arranged as to be closed by the face of the stem E until stem F the exit opening from the channel E registers with the said port F2. Before there is an outlet for the 'compressed air or gases there must be registration between the channels or ports E and F2, and also between the channels or ports F2 and G2.

The space above the stem of the rotor may communicate with an oil chamber and be used for lubrication purposes, or it 'may communicate with the atmosphere and be used for cooling purposes.

The sleeve G is shown slotted at G5 to give additional elasticity, and to enable wear between the working faces to be taken up by any suitable means e. g., by the screw Z. Moreover the corners F5 of the oscillatory member may be grooved out as shownifor the same purpose.

What l claim is l. ln a rotary pump or compressor of the pendulum rotary type for pumping or compressing gaseous fluids, the provision of three elements each having a port or passage therein, said passages being so arranged that the communication. between the passage in the lirst element is cut 0E from that in the second element at some part of their relative movements, and communication between the passage in the second element is cut oi from that in the third element at some part of their relative movements and further all three of the ports or passages are required to be brought into registration before the fluid can escape from the pump.

2. A rotary pump or compressor comprising a pump body, a rotor having a stem with an outlet passage therein, an oscillatory member in which the stem slides also provided with an outlet passage, and a sleeve partially surrounding the oscillatory member and also provided with an outlet passage, means for oscillating said sleeve and causing it to have a greater movement than that of the oscillatory member, in which the stem slides, all three outlet passages requiring to register before the fluid can escape from the pump. 1

3. A rotary pump or compressor comprising a pump body, a rotor having a stem with an outlet passage therein, an oscillatory member in which the stem slides, also provided with an outlet passage, said two passages only registering when the rotor has completed a predetermined portion of its cycle, and a sleeve partially surrounding the oscillatory member and also provided with an outlet passage, all three of which outlet passages are required to register before the fluid can escape from the pump.

GEORGE HANDLEY. Witnesses:

GEORGE HARRISON, HERBERT A. BEEs'roN. 

